Duct Sensor CO₂ / Humidity / Temperature For combined measurement of CO₂, relative humidity and temperature in the duct. Dual channel CO₂ technology. The measured values are output via BACnet. NEMA 4X / IP65 rated enclosure. Type Overview Type active CO₂ BACnet DC 0...5 V, DC 0...10 V active temperature DC 0...5 V, DC 0...10 V Technical Data Electrical data Power supply DC 15...24 V, ±10%, 0.3 W Power supply AC Electrical connection Cable entry 24 V, ±10%, 6 VA Removable spring loaded terminal block max. 2.5 mm² Cable gland with strain relief 2 x Ø6 mm Functional data Sensor Technology CO₂: NDIR (non dispersive infrared) dual channel rh: with stainless steel wire mesh filter Communicative control active note Media BACnet MS/TP Measuring data Measuring values CO₂ Temperature Relative humidity Measuring range CO₂ Measuring range humidity Measuring range temperature Measuring range absolute humidity Measuring range enthalpy Output DC 0...5/10 V selectable with switch Air 0...2000 ppm 0...100% rh Attention: max. measuring temperature is restricted by max. medium temperature (see Safety data) 0...80 g/m³ 0...85 kj/kg Measuring range dew point -20...80 C Accuracy CO₂ ±(50 ppm + 3% of measuring value) Accuracy humidity ±2% between 10...90% r.h. @ 21 C Accuracy temperature active ±0.5 C @ 21 C [±0.9 F @ 70 F] www.belimo.com en-gb 2019-01-10 Subject to change 1 / 5
Materials Cable gland PA6, black Housing Probe material UV resistant Cover: Lexan, orange Bottom: Lexan, orange Seal: 0467 NBR70, black PA6, black Safety data Ambient humidity Max. 95% r.h., non-condensing Ambient temperature Medium temperature Operating condition air flow Protection class IEC/EN Protection class UL min. 0.3 m/s max. 10 m/s III Safety Extra-Low Voltage (SELV) UL Class 2 Supply Certification IEC/EN IEC/EN 60730-1 Certification UL Degree of protection IEC/EN Degree of protection NEMA/UL culus acc. to UL60730-1A/-2-9/-2-13, CAN/ CSA E60730-1:02/-2-9 IP65 Quality Standard ISO 9001 NEMA 4X, UL Enclosure Type 4X Safety notes The installation and assembly of electrical equipment should only be performed by authorized personnel. This device has been designed for use in stationary heating, ventilation and air conditioning systems and must not be used outside the specified field of application. Unauthorised modifications are prohibited. The product must not be used in relation with any equipment that in case of a failure may threaten human, animals or assets. Ensure all power is disconnected before installing. Do not connect to live/operating equipment. Please comply with Local laws, health & safety regulations, technical standards and regulations Condition of the device at the time of installation, to ensure safe installation This data sheet and installation manual www.belimo.com en-gb 2019-01-10 Subject to change 2 / 5
Remarks General remarks concerning sensors Build-up of Self-Heating by Electrical Dissipative Power Application Notice for Humidity Sensors Information Self-Calibration Feature CO₂ Sensing devices with a transducer should always be operated in the middle of the measuring range to avoid deviations at the measuring end points. The ambient temperature of the transducer electronics should be kept constant. The transducers must be operated at a constant supply voltage (±0.2 V). When switching the supply voltage on/off, onsite power surges must be avoided. Temperature sensors with electronic components always have a dissipative power which affects the temperature measurement of the ambient air. The dissipation in active temperature sensors shows a linear increase with rising operating voltage. This dissipative power should be taken into account when measuring temperature. In case of a fixed operating voltage (±0.2 V) this is normally done by adding or reducing a constant offset value. As Belimo transducers work with a variable operating voltage, only one operating voltage can be taken into consideration, for reasons of production engineering. Transducers 0...10 V / 4...20 ma have a standard setting at an operating voltage of DC 24 V. That means, that at this voltage, the expected measuring error of the output signal will be the least. For other operating voltages, the offset error will be increased by a changing power loss of the sensor electronics. If a re-calibration should become necessary later directly on the sensor, this can be done by means of a trimming potentiometer on the sensor board. Refrain from touching the sensitive humidity sensor/element. Touching the sensitive surface will void warranty. For standard environmental conditions the manufacturing accuracy specified in the datasheet will be covered by the calibration warranty for two years. When exposed to harsh environmental conditions such as; high ambient temperature and/or high levels of humidity or presence of aggressive gases (i.e. chlorine, ozone, ammonia) the sensor element may be affected and readings may be outside specified accuracy. Replacement of deteriorated humidity sensor due to harsh environmental conditions are not subject of the general warranty. All CO₂ sensors are subject to drift caused by the aging process of the components, resulting in regular re-calibration or replacement units. However the dual channel technology integrates automatic self-calibration technology vs common used ABC-Logic sensors. Dual channel self-calibration technology is ideally suited for applications operating 24/7 hours such as hosiptals or other commerical applications. Manual calibration is not required. Scope of delivery Scope of delivery Description Type Mounting flange for duct sensor 19.5 mm A-22D-A35 Accessories Optional accessories Description Type Replacement filter Stainless steel, wire mesh A-22D-A06 Connection adapter M20 for cable 1 x 6 mm (Multi-pack 10 pieces) A-22G-A01.1 Connection adapter M20 for cable 2 x 6 mm (Multi-pack 10 pieces) A-22G-A02.1 www.belimo.com en-gb 2019-01-10 Subject to change 3 / 5
Wiring diagram 1 and 5: Status LED 2 red: Error 3 yellow: Tx 4 yellow: Rx Detailed documentation Notes Wiring RS485 Wiring RS485 (Modbus RTU & BACnet MS/ TP) The separate document, BACnet PICS, informs about the PICS, MAC addressing and bus Termination (DIP1 & DIP2). Connection via safety isolating transformer. Parallel connection of other devices possible. Observe the performance data. The wiring of the line for BACnet MS/TP / Modbus RTU is to be carried out in accordance with applicable RS485 regulations. Modbus / BACnet: Supply and communication are not galvanically isolated. Connect earth signal of the devices with one another. www.belimo.com en-gb 2019-01-10 Subject to change 4 / 5
Dimensions Dimensions Type Weight 0.27 kg www.belimo.com en-gb 2019-01-10 Subject to change 5 / 5